Warp stop-motion for looms.



No 65E,8,l:32..

Patented lune l2, I900. J.-F. DUSTIN. WARP STOW? MOTION FOB LUDMS.

(Application; filed 5591c. 22, 1898.);

2 Sheets-Sheet I.

(No Model.)

Inventor.

Witnesses.

Nn 65l,8l3 Patented lune I2Ql900.

J. F. DUSTIN.

WARP STOP MOTION FOR LOOMS. (Application filed Sept. 22, 1898.)

(No Model.) 2 Sheets-Sheet 2.

Witnesses. Inventor.

UNITED STATES PATENT OFFICE.

JOHN F. DUSTIN, OF FITCHBURG, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 651,813, dated June 12,1900.

I Application filed September 22, 1893- Serial No. 691,608. No model.)

To all whom it may concern.-

Be it known that I, JOHN F. DUSTIN, a citizen of the United States,residing at Fitchburg, in the county of Worcester and State ofMassachusetts, have invented a new and useful arp Stop-Motion for Looms,of which the following is a specification.

My invention relates to a mechanism for stopping a loom upon the failureor breakage of a Warp-thread; and the-object of my invention is toprovide a simple, eflicient, and durable warp stop-motion which can beapplied to existing or new looms at comparatively-small expense.

One especial object which I have had in view in constructing warpstop-motions according to my present invention is to time the stoppingdevices so that they will not be affected by any undue slackness orvariation in the tension of the several warp-threads.

To these ends my invention consists of the parts and combinations ofparts of my warp stop-motion, as hereinafter described, andin theconstruction of a composite drop-heddle for use in connection therewith,as will be hereinafter explained.

In the accompanying two sheets of drawings, Figure l is a longitudinalsectional view showingsufiicient-parts of a loom to illustrate theapplication of myinvention thereto. Fig. 2 is an enlarged fragmentaryperspective view illustrating the construction of the heddles andheddle-frame. Fig. 3 is a similar view illustrating a slightly-modifiedform of construction. Fig. 4 is a perspective View illustrating amodified form of heddle which may be employed. Fig. 5 is a detail viewillustrating the manner in which the heddles may be weighted to adaptthem for use in connection with different grades of yarn. Fig. 6 is adiagrammatic View showing the position of the parts during the normaloperation of the loom. Fig. 7 is a similar view showing the position ofthe parts when the stopping devices will be brought into action, andFig. 8 is a perspective View of a guide-piece for holding theharness-frames in position.

My invention, although certain features thereof may be employed indifferent constructions, relates especially to that class of warpstop-motions which are controlled by drop-heddlesthat is to say, to thatclass of warp siop-motionsin which the'heddles are mounted in theirheddleframes so as to be capable of an independent motion therein.Inthis class of warp stop-motions when a heddle-frame is moved down thetension of the warp-threads will tend to raise the beddles to theirhighest position in their heddleframe. Whenever a warp-thread is broken,the heddle corresponding thereto willnot be picked up or raised at thistime, and the feeler or other devices controlled by the heddles willbring the stopping devices into action to stop the 100m. In applying andusing warp stop-motions of this character I have found in practice thattheir reliability depends ina large measure upon maintaining asubstantiallyuniform tension for the warp-threadsthat is to say, in awarp stop motion employing drop-heddles as ordinarily constructed itfrequently happens that the stopping devices will be brought into actionwhenever a warp-thread becomes slight-1y loosened or" the heddles intheir frame will not affect the operation of the stopping devices exceptat a time when the heddle-frames have been brought to rest and arestanding in their1ow est position.

When a heddle-frame has been moved down so as to open the shed, the bendor deflection of the warp-threads will be sufficient to insure thelifting of each individual heddle out of the way of its feeler withoutregard to slight variations in tension, whereas in former constructions,so far as I am familar with thesame, the feeler is shifted or operatedwhile the heddle-frame is still moving down, so that slight variationsin the tension of the Warp-threads will be much more liable tounnecessarily cause the stopping devices to act than in a warpstop-motion constructed according to the present invention.

My warp stop-motion which I have illustrated herein comprises aheddle-frame, heddles mounted therein, so as to be capable of anindependent movement, a feeler movably mounted in the heddle-frame, andmeans for actuating the feeler after the heddle-frame has reached itslowest position. In the specific construction which I have illlustratedthe feelers are moved or shifted in one direc-- tion by'a stationarycam-plate when the heddle-frame is rising. For shifting the feelers inthe opposite direction I provide a plate normally tending to move intoposition to shit t the feelers, and connections controlled by the layare provided for withholding said plate until after the heddle-frame hasreached its lowest position. By controlling the movable shifting-platefrom the lay I have provideda stopping mechanism which is timed to actwhen the heddles are in their lowest position, as in the normaloperation of weav- 'ingthe heddle-frames dwell or remain in their lowestposition while the lay is moving back,

and then forward again to complete one pick.

v Referring to the'drawings and in detail, A designates the side frameof'a loom; B, the warp-beam thereof; D,-the vibrating lay, and

, Q the whip-roll. These parts may be of the ordinary or approvedconstruction.

The heddle-frames F, as illustrated most clearly in Figs. 6 and 7,consist of side pieces 1.0,which are connected and secured together 1simply by transverse heddle-rods, and I prefer to dispense with the topand bottom pieces employed in the ordinary forms of heddleframes, so asto provide a lighter construction, and to leave the bottom of theheddleframes open, so that the heddles may be weighted or provided withpendants to adapt them for different grades of yarn, as hereinafterdescribed.

In my preferred construction, as illustrated in Fig. 2, thehedcllerframes are connected by two sets of heddle rods or plates 12 and13, so that two sets of heddles 14: may be strung thereon in differentrelative vertical planes.-

Secured in the heddle-frames between the heddle-rods 12 and 13- aretoothed strips or rods 16. Movably mounted between the toothed strips 16is a toothed feeler 17, having eyes of the heddles 14 are long enough toal low for a lost motion or drop of the heddles in their frame, andinpractice I have found that the use of plain wire heddles havingelongated eyes is objectionable, as the end of one heddle is liable tobe pushed through the eyeof a succeeding heddle or become interlacedtherewith. V

By providing the heddles 14 employed in off catch of the loom.

a warp stop-motion constructed according to my invention withoverhanging metal plates 15 I have not only constructed the heddles sothat they will cooperate with the feeler 17 arranged between the heddlerods, as described, but I have also provided an efficient means'forpreventing the heddles from becoming interlaced. g

Mounted in a bearing-piece 19 beneath the warp-beam, as illustrated inFig. 1, is athrowoff hook 20 for engaging the ordinary throw-Pivotallyconnected to the throw-off hook 20 is a throw-01f link 21. Thethrow-off. link 21 is provided on its under side with anincliue or camcooperating -with a roller 22, carried by the vibrating lay. The upperside of the link 21 is provided with a notch or projection cooperatingwith a downwardly-extending finger carried by the lay D.

At its rear end the link 21 is connected by a rod or wire 24 to operatethe movable plate actuating the feelers, as illustrated most clearly inFigs. 6 and 7. shown in these figures,'a bracket 26 is secured to theloom side. Mounted on the bracket 26 and preferably adjustable thereonis a piece 27 ,-carrying an angle-arm 28. The movable plate forshiftingthe feeler 17 when-the heddleframes are in their lowest positionisjournaled in the arm 28. Secured to the opposite loom-frame is abracket 29, adjustably fastened to which is an angle-arm 30. Secured inthe angle-arm 30 is an L-piece 31, preferably made out of round iron,and mounted on the L-piece 31 is a cam-plate 32 for rest-oring orshiftingback the feelers 17. The campie'ce 32 can be adjusted up'anddown on the L-piece 31, and by making the L-piece 31 out of round ironthe cam 32 can be tipped or tilted, which is in some cases adesirableadjustment, as in some looms the front harness-frames areraised-slightly more than the .rear harness-fram es.

In the operation of a warp stop-motion for looms as thus constructedwhen the heddleframes reach their lowest position, as illustrated inFig. 1, the lay D moves back from the front of the loom, and as theroller 22, carriedby the lay, moves from under theinclined portion ofthelink 21 the weight of the link 21, which may, if desired, bereinforced by a spring, as shown in Figs. 6 and 7, will tip-the 'twosets of heddles arranged in different vertical planes, the feelers maypass through the ICS IIO

eyesofthe heddles, the upper edges of the heddle-rods themselves beingnotched or toothed, and. I have illustrated such a construction in Fig.3. As shown in this figure, each heddle-rod consists of two toothedsections 35, mounted between which are movable feelers 36, and wherethis construction is adopted the metallic pieces 150, secured or brazedin the upper parts of the heddles 140, need not project to one side asfar as in the construction before described.

In somecasesin orderto diminish thelength of the drop or lost motion ofthe heddles necessary to control a stopping mechanism constructedaccording to my invention I contemplate employing pivoted metallicpieces which are operated from but not rigidly secured to the heddles,and I have illustrated such a construction in Fig. 4. As shown in thisfigure, the heddleeye 40 of the heddle 240 maybe made shorter than inthe constructions before .described. Passing through a secondary eye 41of the heddle 240 is a blade or metallic piece 250, a series of whichblades may be pivoted upon a rod, as 43, to cooperate with a series ofsuch heddles. In this construction it will be seen that the drop or lostmotion of the heddle 2&0 will produce an increased motion of themetallic pieces 250, which cooperate with the feelers.

In some cases, where very stiff or wiry yarns are being woven, itsometimes happens that the light wire heddles are not heavy enough toinsure the positive action of the stopping devices, and in order toadapt my warp stopmotion for all classes of weaving I contemplate insome instances weighting the heddles or providing them with pendants toinsure their proper action even when coarse or wiry yarns are used. Insuch cases the heddles 14 are provided at their lower ends with weightsor pendants l8,which may be detachably secured to the wires which formthe heddles in any ordinary manner. Different lengths of weights 18 maybe used to secure the necessary results, as desired.

To insure the heddle-frames retaining their proper position in the loom,the guide-pieces illustrated in Fig. 8 may be employed, if desired. 1

As shown most clearly in Figs. 6 and 7, the guide-pieces 33 are adjustably fastened to the elbow-pieces 28 and 30 at the opposite sides ofthe loom, respectively, and detachably secured in the guide-pieces 33 Imay, if desired, employ cross-rods 34, which extend across from theguide-pieces 33 at each side of and between the several heddle i'ramesand form an abutment which limits the lower plane of the shed, so thateven if a thread is unduly 'slackened its heddle may be picked up out ofthe way of the feelers as the heddle-frames move down between thecrossrods 34.

4 without departing from the scope of my invention as expressed in theclaims. I do not wish, therefore, to be limited to the form which I haveshown and described; but

hat I do claim, and desire to secure by Letters Patent of the UnitedStates, is-

1. In a warp stop-motion for looms, the combination of a heddle-frame, aseries of drop heddles mounted therein, a feeler mounted in and carriedby the heddle-frame in position to cooperate with the series ofdrop-heddles,stopping connections controlled by the feeler, and meansfor actuating the feeler while the heddle-frame is stationary,substantially as described.

2. In a warp stop-motion for looms, the combination of a heddle-frame,heddles car ried thereby and capable of an independent movement therein,a feeler mounted in the heddle-frame, connections controlled by the layfor actuating the feeler after the heddle frame hasreached its lowestposition and stopping connections controlled by the feeler,substantially as described.

3. In a warp stop-motion for looms, the

combination of a series of drop-heddles or detectors, alongitudinally-movable toothed feeler cooperating therewith, stoppingconnections controlled by the feeler, and connections from the lay foractuating the feeler during the dwell of the heddles, substantially asdescribed.

4. As an article of manufacture, a wire heddle carrying a metallic endplate, substantially as and for the purposes set forth.

5; The combination of a heddle-frame, two sets of heddles mounted in theheddle-frame in different relative vertical planes, a feeler movablymounted in the heddle-frame be-. tween the two sets ofheddles, saidheddles being provided with overhanging projections or platescooperating with the feeler and stop ping connections controlled by thefeeler, substantially as described.

6. The combination of a heddle-frame, two

sets of heddles mounted in the heddle-frame in different relativevertical planes, toothed bars secured in the heddle-frame between thetwo sets of heddles, a toothed feeler movably mounted between said bars,the heddles be ing provided with overhanging projections or bladescooperating with the feeler and stop ping connections controlled by thefeeler, substantially as described.

7. The combination of a heddle fram e, hed- I dles movably mountedtherein, a feeler coopcrating with the heddles, means for moving thefeeler in one direction when the heddleframe rises, a plate normallytending to move into position to shift the feeler in the oppo= sitedirection, connections from the lay for withholding said plate untilafter the heddleframe reaches its lowest position and stoppingconnections controlled by the feeler,substantially as described. p 8.The combination of a heddle-frame, heddles movably mounted therein, afeeler coop i crating with the heddles, an adjustable ca rno plate formoving the feeler in one direction when'tlle heddle-frame rises, a platenormally tending to move into position to shift the feeler in theopposite direction, connections from the lay for Withholding said plateuntil-after the heddle-franne reaches its low? est position and stoppingconnections'controlled by the feeler, substantially as dev scribed.

9. The combination of a heddlefram'e, bed

dles movably mounted therein, a feeler cooperating with the heddles, anadjustable cam-. plate for moving the-feeler in one direction when theh'eddle-frame rises, a plate nor- .my hand in the presence of twosubscribing mally tending to move into position to shift the. feeler inthe opposite direction, a stop-V ping-linkconnected to the plate, aprojection or roller carried by the lay for normally raising andlowering the stopping-link to actuate said plate and stoppingconnections conatrolled by the stopping-link, substantially asdescribed. I j p lO. The combination 0fahedd1e-frame,heddles movablymounted therein, a notched or Etoothed feeler cooperating with theheddles, an adjustable cam-plate for moving the-feeler iin-one directionwhen the heddle-franie rises, a stopping-link having an incline on itslower edge for engaging a projection orroller carried by thevibratinglay, and a notch or pro- :jection on its upperedge cooperating with a 1projection or finger carried by the lay and stopping connectionscontrolled by the stopping-link, substantially as described.

In testimony whereof I have hereunto set witnesses. v V

JOHN F. DUSTIN.

Witnesses:

I LoUIs W. SOUTHGATE,

PHILIP W. SOUTHGATE.

